Daniel fraser



(No Model.)

D. FRASER. YHATGHWAY DOOR OPERATING DEVICE.

Patented Dec. 8,1891.

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- HIS ATTORNEY UNITED STATES PATENT CFEIGE.

DANIEL FRASER, OF NEW YORK, N. Y., ASSIGNOR TO THE EXCELSIOR ELEVATORGUARD AND HATCH COVER COMPANY, OF SAME PLACE.

HATCHWAY-DOOR-OPERATING DEVICE.

SPECIFICATION forming part of Letters Patent No. 464,721, dated December8, 1891.

Application filed March 411891.

To all whom it may concern:

Be it known that l, DANIEL FRASER, of New York, in the county and Stateof New York, have invented a certain new and useful Improvement inMechanism forOperatingHatch- Covers, of which the following is aspecification.

This improvement relates to devices for operating hatch-doors employedin connection with elevator shafts or wells wherein elevatorcars areraised and lowered; and the object of the improvementis to provide asimple, cheap, and efficient mechanism whereby the hatchdoors may beopened and closed gently by the passage of the elevator-car.

I will describe a mechanism for operating hatch covers or doors,and thenpoint out the novel features in a claim.

In the accompanying drawings, Figure 1 is a front elevation of a portionof an elevator- Well, a portion of a floor adjacent to the Well, aportion of an elevator-car, and mechanism embodying my improvement. Fig.2 is a side elevation of the same parts.

Similar letters of reference designate corresponding parts in bothfigures.

A designates a joist forming part of a floor in a building.

B is a well formed in the building. I have not represented itsboundaries, because it may be of any suitable construction.

C designates a hatch cover or door connected at one edge byhinges o withthe floor, of which the joist A forms part. This door may be loweredinto a horizontal position to close the hatchway or well or raised intoa vertical position, as illustrated by dotted lines in Fig. 2, to openthe well or hatchway. D designates a post erected upon the said flooradjacent to the hatchway and serving as a support to which a lever E isfulcrumed through the agency of a stud e, fastened to the post. Thelever is shown as having a straight body and its ends bent in reversedirections therefrom. One end of this lever is connected by a flexibleconnection with the hatch-door. In the present instance this flexibleconnection consists of a steel strap F, ad j ustably connected at oneend with the lever Serial in. 883,781. (No model.)

by means of a screw and nut and connected at the other end to thehatch-cover a short distance from the hinge. This strap passes around aseries of guide-pulleys f, arranged in line and journaled to a frame f,fastened to the post D. Obviously,if the other end of the lever E islowered the hatch-cover will be raised, and if the position of the leveris controlled the position of. the hatch-cover will also be controlled.I By releasing thelever E gently it is obvious that the hatch-door maybe prevented from closing violently. T0 attain this result, that end ofthe lever which is not connected with the strap F is preferably providedwith an anti-friction roller 6 and is made to coact with a rod G,carried by the elevator-car H. This rod occupies an upright position andhas both its ends turned toward the central line of the elevator-car andtoward the vertical plane of the fulcrum-point of the lever E. Its upperend is turned inward far enough to contact with the roller 6 of thelever E when the car ascends. After the roller c has come in contactwith the straight portion of the rod G it will be held againstvibration, and consequently the hatch-door will be held in a raisedposition until the rounded lower end of the rod is by the ascent of theelevatoncar brought opposite the roller 6 of the lever E, whereupon thelever will be allowed to move slowly under the weight of the hatch-coverand lower the same gently until the hatch-door is closed. The closing ofthe hatch-door will not occur until just as the rod G releases the leverE. In the descent of the elevator-car the rounded end of the rod Gcoacting with the lever E allows the hatch-cover to descend gently atthe proper time. 7

It will be seen that the lever E operates parallel with the pin of thehinge c or parallel with the hinged edge of the hatch-cover C,

so that the lever does not project over or cross the hatohway or extendbeneath the floor of the car. The rod G is fastened to one side of thecar, so that the lever may engage with it. WVhat I claim as myinvention, and desire to secure by Letters Patent, is-

The combination, with a hatchway, a hinged cover therefor, and a car, ofa lever E, fulcrumed to a post adjacent to the hatchway, an upright barcarried by the car and coactin g with the lever E, a flexible steelstrap c0n nected at one end to said lever and at the other end to thecover, and a series of rollers arranged substantially in line 011 saidpost, over which the said flexible steel band passes, substantially asspecified.

In testimony whereof I have signed my name to this specification in thepresence of 10 two subscribing Witnesses.

DANIEL FRASER.

\Vituesses:

S. O. EDMONDS, WM. A. PoLLoeK.

